LTC2640CTS8-LZ12#TRMPBF

Overview

The LTC2640CTS8-LZ12#TRMPBF is a single-channel, 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single supply voltage ranging from 2.7V to 5.5V. The device utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a typical settling time of 4.1µs at 3V, and a supply current of 180µA at 3V. It incorporates a power-on reset circuit that defaults the output to zero-scale.

Feature Summary

• Integrated 10ppm/°C precision reference with 2.5V full-scale output
• Rail-to-rail output buffer guaranteed monotonic over temperature
• 3-wire SPI/MICROWIRE compatible serial interface operating up to 50MHz
• Power-on reset to zero-scale with low power consumption (180µA at 3V)

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-piece tape and reel packaging quantity as defined in the manufacturer's documentation. Confirm the C-grade temperature range (0°C to 70°C) matches the application requirements. Ensure the LTS8 package type aligns with the PCB footprint design. Cross-reference the part number against the latest Analog Devices selection guide for any updates to lead-free or RoHS compliance status.

Selection Notes

Select this component when a single-channel 12-bit DAC with an integrated low-drift reference is required in a compact TSOT-23 package. The LTC2640-L variant is suitable for applications requiring a 2.5V full-scale output with a 2.7V to 5.5V supply range. Choose the LZ suffix if a zero-scale power-on reset is necessary for system initialization. Consider the H-grade variants if operation within the –40°C to 125°C automotive temperature range is needed.

Part Context

This part belongs to the LTC2640 family of single voltage-output DACs available in 12-, 10-, and 8-bit resolutions. The family offers combinations of accuracy, power-on reset values, and full-scale voltages (2.5V or 4.096V). The LTC2640CTS8-LZ12#TRMPBF specifically denotes the commercial grade, 12-bit resolution, zero-scale reset, and 500-unit tape and reel packaging configuration.

Replacement Considerations

Direct replacements within the same family include LTC2640CTS8-HZ12#TRMPBF for a 4.096V full-scale output or LTC2640CTS8-LM12#TRMPBF for mid-scale power-on reset. For different resolutions, consider LTC2640CTS8-LZ10#TRMPBF (10-bit) or LTC2640CTS8-LZ8#TRMPBF (8-bit). Verify pin compatibility and software command set alignment when substituting.